The rms speed of O 2 is v 1 , N 2 is v 2 and that of the He is v 3 . If we taken the mixture of equal amount of v 1 , v 2 and v 3 then the rms velocity of N 2 in the mixture is -
A
B
(v 1 v 2 v 3 ) 1/2
C
v 1 + v 3
D
v 2
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D
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